Network services such as DHCP, DNS and NTP are invisible when they work and cause confusing symptoms when they fail. Users rarely say 'DNS is broken'; they say 'the internet is down' or 'I can't log in'. Each service has a characteristic failure signature, and learning those signatures lets you go straight to the cause instead of checking cables and routers first. Network+ tests four: DHCP scope exhaustion, duplicate IP addresses, DNS failures and NTP problems.
Free account
Keep reading for free
Create a free StudyToCert account to read the rest of this lesson: 7 more sections, 7 key terms, a real-world example, an exam tip and self-check questions. Every lesson, lab and practice test is free with an account.